> Is nobody willing to acknowledge the reality of genetically inherited IQ?

What are you saying? are you really saying the lighter the skin the more "intelligent" one is? Ceteris paribus ? you know it's ridiculous and you know where this kind of "pseudo-scientific" ideology leads.

> Is that why we hide the truth,

What truth ? racism ? Ask yourself ,did you come to that conclusion after researching the topic or where you seeking arguments to fuel and rationalize your pre-existing bigotry ? Because with the same arguments you could make the same case to justify sexism or antisemitism. Yes for the nazis, the "vile" nature of the jews came from their genes.